METHOD OF MEASUREMENT OF EXTRA LOW FLIGHT ALTITUDE OF AIRCRAFT, MAINLY SEAPLANE ABOVE WATER SURFACE AND PARAMETERS OF SEA SWELL

摘要

aircraft instrumentation engineering; flight parameter automatic control systems. SUBSTANCE: novelty of invention consists in recording fields of antenna near zone by noting drift deltaf of resonance frequency of, for example of series-connected LC- circuit which is measured by means of bridge circuit. In case of swelled sea, picked-off harmonic signal is subjected to detection; then, direct and alternating components are separated from detected signal are measured. EFFECT: possibility of combining extra low altitude altimeter and sea swell parameter meter in one unit; possibility of determining flight altitude in landing on unprepared water area. 2 cl, 1 dwg